Turret-lathe



(No Model.) 2 Sheets-Sheet 1.

P. H. RICHARDS. TURRET LATHE.

N0. 515,365. Patented Feb. 27, 1894.

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FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT, ASSIGNOR TC WALTER WOOD,OF PHILADELPHIA, PENNSYLVANIA.

TU RRET-LATH E.

SPECIFICATION forming part of Letters Patent No. 515,365, dated February27, 1894.

Application filed December '7, 1893. Serial No. 493.065- (No model.)

To aZZ whom it may concern.-

] 3e it known that I, FRANCIS I-I. RICHARDS,

a citizen of the United States, residing at Hartford, in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Turret-Lathes, of which the following is aspecification. This invention relates to locking and clamping devicesfor the turrets of turret-lathes and has special reference to that classof turretlocking and -clamping devices in which the turret issimultaneously locked against rotation on the turret-supporting columnby means of a lock-bolt, and clamped thereon by expanding said columnwithin the central bore of the turret.

In the drawings accompanying and forming a part of this specification,Figure 1 is a plan view, with some parts removed, of a portion of theturret-slide of a turret-lathe, the supporting column thereon, and aturret mounted on said column and provided with my improvedturret-locking and -clamping device. Fig. 2 is a vertical section of thesame in line a-a of Fig. 1, as seen from the left-hand in said figure.Fig. 8 is a vertical longitudinal section in line bb of Fig. 1. Fig. 4is a view similar to Fig. 3, but showing the operative parts of thedevice in a different position. Fig. 5 is a detail view of the lock-boltwedge shown partly in section.

Similar characters designate like parts in all the figures.

My improved turret-mechanism consists essentially of an expansiblecolumn, a turret revolubly mounted on said column and having notcheswhereby it may be locked in successive positions, and improvedturret-locking means for simultaneously locking the turret and expandingthe column within the same.

In the drawings, the turret, which is designated in a general way by B,is shown revolubly mounted upon a column, C, that is or may be formedintegral with the usual turret-slide, designated in a general way by D,a portion only of the slide being shown in the drawings. The turret B isshown constructed for carrying six tools, (the more usual number,) andthe turret-locking mechanism is shown constructed and arranged forlocking the turret in each of its six successive positions to bring thetools successively into fixed alignment with the work-carrying spindleof the lathe. The turret is held in place on the column C by means of acap, E, said cap being shown secured to the column by means of suitablescrews, as 4.

The Vertical column C, as shown in the drawings, is centrally bored at3, and is slotted or mortised on one side of said bore, as at 14, toreceive the wedge-shaped lock-bolt, G, shown in detail in Fig. 5. Thewedge-portion or body, 5, of the lock-bolt, as shown in Figs. 1 and 5,is tapered in two directions; that is,- vertically and laterally so thaton the drawing-up of said bolt to expand the column, it shall also beforced outwardly to lock the turret against rotation on said column. Themortise 14 of the column is formed on lines corresponding to the form ofthe bolt. The forwardly-projecting edge, 10, of said bolt is wedgeshaped cross sectionally to fit the notches, 12, of the turret, whichare correspondingly wedge-shaped, which construction insures the lockingof the turret against rotation on the column C when the lock-bolt isdrawn upward. Theinclined faces, 34 and 36, of the bolt G engage thecorrespondingly inclined faces, 33 and 35, of the mortise 14 to advancethe bolt and lock the turret against rotation, and at the same time actas wedges to expand the column C within the turret, on the raising ofthe bolt.

As a means for raising the lock-bolt, said bolt is shown provided with astem, 7, threaded at its upper end to receive the nut, 8, which may bethe hub of a lever, as H, by means of which said nut may be turned toraise the bolt, said nut bearing against the turret-cap E. A spring, 9,is provided coiled about the stem 7 of the bolt to force downward saidbolt on the unscrewing of the nut 8, said spring acting in a well-knownmanner against the cap E and the bolt G. As a means for drawing back thesaid bolt at the same time to unlock the turret, I have provided a stud,15, fixed in said bolt and carrying a spring, 16, which bears againstthehead of said stud and against a washer, 17, engaging the surface of ICOthe bore 30f the column. The inclination of the sides of the notches 12is such, however, that said notch-sides act as wedges to force back thelock-bolt when the turret is turned and the bolt is lowered; saidretracting device, therefore, is not indispensable.

To assure a perfect fit of the lock-boltin the mortise 14 of the column,in some cases I make a milling cut, 18, Fig. 5, in one side of the boltand place therein a shoe, as 19 which is fitted for free movementin saidout topermit the face 36 thereof to come into perfect engagementwith'the corresponding face 35of the mortise 14 of the column, asillustrated in Fig. 2.

I have not shown any means for rotating the turret, but any one of thewell-known turret-rotating devices maybe employed to perform this work,or the turret may be turned by hand, after the manner now followed inthe case of some turret-lathes already in use.

Having thus described my invention, I claim 1. The improvedturret-locking mechanism herein described, consisting of an expausibleturret carrying column divided or slotted transversely on diverginglines substantially as described, a turret revolubly supported upon saidcolumn and having a series of locknotches formed in the inner facethereof, a column-expanding wedge or lock-bolt interposed between theadjacent ends of the slotted or divided column and having a portion orprojection adapted for entering said notches in the turret, and meansfor impartinga longitudinal movement to said lock-bolt, substantially asand for the purposedescribed.

2. In a turret-mechanism, the combination of an expansibleturret-carrying column divided or slotted transversely on radial linesand inclined width-wise at adjacent ends substantially as described, aturret revolubly supported upon said column and having a series ofnotches formed therein adjacent to said column, a locking-bolt or wedgeof a crosssectional shape coinciding, substantially, with the slot inthe column and having a transversely projecting portion to fit a notchin the turret, a clamp or cap bearing upon the turret at each side ofthe column, and a lock-bolt actuator bearing against said clamp andadapted for imparting a longitudinal movement to said bolt andsimultaneously moving said bolt transversely into engagement with one ofthe notches of the turret and expanding the column, substantially as andfor the purpose described.

3. The turret-carrying column slotted 1ongitudinally on one side thereofand having the adjacent faces of its ends oppositely inclined, incombination with a turret revolubly supported upon said column andhaving notches formed in its inner face adjacent to said column, alock-bolt interposed between the adjacent ends of said column andadapted for longitudinal and transverse movement to simultaneouslyexpand the column, and engage and'lock the turret with relation thereto,I

a bolt-actuator, a cap interposed between the actuator and turret, and aspring interposed between said cap and lock-bolt, substantially as andfor the purpose described.

4. The improved turret-locking mechanism herein described, consisting ofa tubular turret carrying column divided or mortised transversely onradial lines and oppositely inclined width-wise at adjacent ends, aturret revolubly supported upon said column and having a series ofradially disposed notches formed in its inner face substantially asdescribed, a wedge-shaped lock-bolt fitted for longitudinal andtransverse movement between the ends of the turret-column and having aprojecting stem screw-threaded at its outer end, a' cap fixed tothecolumn and bearing at its end upon the turret, a lock-bolt actuatorengaging the stem of the bolt,- and bearing upon said cap, and adaptedforsimultaneously moving the lock-bolt longitudinally to expand thewedge, and transversely to engage and lock theturret'against rotarymovement, and longitudinally and transversely retracting devices indirect connection with said lock-bolt, su'bstantiallyas and for thepurpose described.

5. 'lhe'combina'tion with the tubular turret-supporting column mortisedor divided transversely with the adjacent faces' of said mortiseoppositely inclined,- of a turret revolubly supported upon said column,a-lockbolt constructed to fit said mortise-and adapted forlongitudinaland transverse movement therein and having a binding shoeloosely supported in one side thereof substantially as described, a capsecured to said column and bearing upon the turret, alock-bolt-actuator, a spring interposed between thecapand lock -bolt andadapted to impart a return movement to the bolt when the actuatorisreleased, and a transverselyretracting device consisting of a studsecured to the lock-bolt and having a head at its outer end, awasherbearing against the inner" face of the turretsupporting column, and aspring interposed.

between said head and washer, allcons-tructed substantially as and forthe purpose set forth.

6. The combination with a tubular turretcarrying column, mortisedor'divided transversely on radial lines with itsadjaeent' endsoppositely inclined width-wise or vertical, of a turretrevolubl'y'supportedupon said column and having radially disposednotches'upon' its innerface,awedgefittingsaidmortisearrdhaving itsside-faces inclined to correspond'to the inclination of the adjacentends of the'colu'mn and having a projecting screw-threadedstem and atransverse projection to fit the notches of the turret, a clamp or capbearing upon the turret at 'eachside the column, a wedgeactuatorengaging the screw-threadedstem of the wedge and adapted to move saidwedge longitudinally to expand the column, and at the same time forcethe said wedge outward transversely into engagement with a notch of theturret, a spiral spring surrounding the stem of, and interposed betweenthe wedge and cap for imparting a longitudinal retractive movement tosaid wedge, and means for unlocking the bolt with relation to theturret, consisting of a retracting spring mounted upon a stud fixed toone side of said bolt, and

adapted for imparting a transverse movemen r,

to said bolt during its descent, substantially r as and for the purposedescribed.

FRANCIS H. RICHARDS.

Witnesses:

JOHN L. EDWARDS, J12, FRED. J. DOLE.

